import java.util.Scanner;

public class Main1091 {
    public static void main(String[] args) {
        Scanner sc=new Scanner(System.in);
        int n= sc.nextInt();
        int x=0;
        int y=0;
        for (int i=1;i<=n;i++){
            if (i%2==1){
                y=y+i;
            }
            else if (i%2==0){
                x=x+i;
            }
        }
        System.out.print(y);
        System.out.print(' ');
        System.out.print(x);
    }
}
